Product Overview

SHIELD – EVEN BETTER
Fully Modulating Burner with 5:1 Turndown
SHIELD can fire as low as 20% of maximum input when water heating demand is lowest, and increase to
100% for peak-demand periods. This results in better overall efficiency and less cycling compared to
“on-off ” tank-type units that can only fire at 100%.
‘Neg/Reg’ Sealed Combustion Technology
SHIELD utilizes an advanced combustion system which provides NOx ratings compatible with the
most stringent air quality standards. Additionally, the NEG/REG sealed combustion technology
allows the unit to operate with inlet gas pressure as low as 4 inches water column.
Lochinvar has done it again! The Shield™ commercial water
heating product line has been upgraded, refined and expanded
to give you more reasons to choose Shield. The Shield is now
available in eight models. Offering you more sizes in ASME
construction and a new 125,000 Btu/hr-65 gallon model. We
have added a large LCD display and a new control with more
features. All utility connections are now out the top of the unit to
reduce equipment room footprint and improve installation
flexibility. Additionally, a large removable pump access panel has
been added and the control has been moved to the front of the
cabinet, improving the serviceability. These design improvements
and more make the new Shield better than ever.
96% EFFICIENCY —
LIME SCALE FREE FOR LIFE
The Shield water heater operates at 96% thermal efficiency and
provides 100% effective defense against a water heater’s worst
enemy – lime scale buildup on the tank and heating surfaces.
Tank type water heaters suffer from one thing the Shield does
not, lime scale buildup. Lime scale insulates the water from the
heat source, decreasing thermal efficiency and increasing
operating costs. Just a ¼” of lime scale will increase fuel
consumption and raise operating costs as much as 25%.
Shield has no flue tubes inside the tank. The water is heated in
a separate stainless steel heat exchanger mounted above the
tank. By controlling and creating high water velocity through the
heat exchanger, the heat surface areas are kept clean so thermal
efficiency remains high, for life.
The chart below illustrates Shield’s sustained long life efficiency
compared to standard, tank type water heaters.
d
i
s
lo
we
st
,
an
d
in
cr
ea
se to
d less cycling com
pa
red to
s com
pa
tible with the
ustion technolo
gy
n
Y
Yea
rs of
Ope
rat
io
on
%
% E
ffi
cie
e
ncy ov
er
r
Heater
L
Li
fe
Efficiency Loss Due to Lime Scale Buildup
SHIELD
S
SH
H
IELD
Standard
Tank Types
Ope
O
at
ra
ing
Ef
E
fic
en
ie
cy
“In
n
-t
-ta
nk” flue tubes
and
nd
h
hea
t exch
ang
ers suffer
from l
im
me
scale
bu
bu
ildup
beg
in
nn
ing from the
fi
f
rst
hou
r
rs
of
ope
e
ration.
N
NOT
E: The chart is
ba
a
s
sed
on limescale build-up of 1/16 inch per
ye
ye
ar which reduces
operating
eff
e
iciency approximat
el
ly
8-10% per year.